Don't love them, don't hate them
I have had the vanilla, chocolate, kona punch and strawberry banana. The vanilla is ok, I like Clif Shots vanilla better, but still not bad. The chocolate is thicker than the others and tastes a lot like canned cake frosting. Not a big fan of chocolate energy gels, but kind of good in a gross way. The kona punch and strawberry banana are neither good or offensive. They are edible but I would choose most other gels over them. I find the energy that Powerbar gels provide is on par with other brands, so no worries there. Mostly the only difference I have found between brands is preferences of color and texture/consistency. I would try to find individual packets of flavors you want to try before ordering entire boxes.